QuakeIndex

Earthquake · reviewed by a seismologist

M 2.2ml

26 km ESE of Dutch John, Utah

Yes. A magnitude 2.2 earthquake was recorded 26 km ESE of Dutch John, Utah, at 8:00 am MDT on 27 August 2021 (14:00 UTC), 2.7 km deep. 1 person has reported feeling it to USGS.

· 2.7 km deep · released about 54 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Daggett County 35 kmMoffat County 79 kmSweetwater County 89 kmUintah County 91 km
Distance rings around the epicentre, with the nearest towns at their true direction and later quakes as coloured dots. Not a shaking map — see the USGS ShakeMap for that.
When
Magnitude
M 2.2 (ml)
Depth
2.7 km below the surface
Felt
1 report · strongest reported intensity II
Nearest
Daggett County, 35 km W
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1556 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage.

At this magnitude and depth, people at rest would likely notice it out to about 18 km (11 mi) from the epicentre. Estimated from magnitude, depth and distance with the intensity equation USGS Did You Feel It? uses; felt reports, where there are any, are the measurement.

How big was it?

This earthquake released about 54 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.2 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 280,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 200,000× the energy of this one
  3. Around the size people start to feel M 3.0 18× the energy of this one
  4. This earthquake M 2.2 about 54 lb of TNT

Energy from the Gutenberg–Richter relation (log10E = 1.5M + 4.8), rounded to two figures; bar length is magnitude, which is already a logarithm of energy. Magnitudes of past earthquakes from the USGS catalogue.

For this area

No earthquake of M4 or more has been recorded within 50 km since our catalogue begins in 2016.

Before 2016, the USGS record since 1900 lists no earthquake of M5 or more within 50 km.

Since 2016: the QuakeIndex catalogue (US, M1.5+), built from the USGS FDSN event service. Before 2016: USGS ComCat, M5+ from 1900. Distances are between epicentres. This is the record, not a forecast.

Where

Epicentre 40.8793, -109.0870. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Daggett County, UT 35 km (22 mi) W earthquakes near Daggett County
Moffat County, CO 79 km (49 mi) ESE earthquakes near Moffat County
Sweetwater County, WY 89 km (55 mi) NNE earthquakes near Sweetwater County
Uintah County, UT 91 km (57 mi) SSW earthquakes near Uintah County
Rio Blanco County, CO 126 km (78 mi) SE earthquakes near Rio Blanco County
Duchesne County, UT 131 km (81 mi) WSW earthquakes near Duchesne County

Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.

Aftershocks so far

49 earthquakes have been recorded within 50 km since this one.

  1. 2.1 24 km NNE of Vernal, Utah
  2. 3.1 24 km NNE of Maeser, Utah
  3. 3.1 18 km NNE of Maeser, Utah
  4. 3.3 16 km NNE of Maeser, Utah
  5. 3.0 21 km NNE of Maeser, Utah
  6. 3.1 20 km NNE of Maeser, Utah
  7. 3.4 22 km NNE of Vernal, Utah
  8. 3.2 18 km NNE of Maeser, Utah
  9. 3.1 20 km NNE of Maeser, Utah
  10. 3.3 25 km NNE of Maeser, Utah
  11. 3.1 15 km NNE of Maeser, Utah
  12. 3.2 15 km NNE of Maeser, Utah
  13. 3.3 17 km NNE of Maeser, Utah
  14. 3.1 18 km NNE of Maeser, Utah
  15. 3.4 18 km NNE of Vernal, Utah

Counted from the QuakeIndex database, which ingests the USGS feed every 30 seconds · as of . QuakeIndex does not forecast aftershocks. When USGS issues an operational aftershock forecast it appears on the USGS event page.

On USGS

QuakeIndex does not issue warnings. For earthquake early warning see ShakeAlert.